
Perimeter Formulas for Geometric FiguresPerimeter of a geometric figure  is the continuous line forming the boundary of a closed geometrical figure.
Perimeter Formulas for Geometric Figures:
Perimeter of a triangle
Perimeter of a square
Perimeter of a rectangle
Perimeter of a parallelogram
Perimeter of a rhombus
Perimeter of a trapezoid
Perimeter of a circle (Circumference)
Perimeter of a triangleThe perimeter of the triangle ∆ABC is the sum of the lengths of its sides P = a + b + c
Perimeter of a squareThe perimeter of a square is the product of the length of a square side by 4. P = 4a
The perimeter of a square is the product of the length of a square diagonal by 2√2. P = 2√2 d
where P  perimeter of a square, a  the lenth of a square side, d  the length of a square diagonal. Perimeter of a rectangleThe perimeter of the rectangle ABCD is equal to twice the sum of the sides adjacent to one corner. P = 2(a + b)
where P  perimeter of a rectangle, a, b  the length of rectangle sides,i.e., the height and width accordingly. Perimeter of a parallelogramPerimeter of the parallelogram ABCD is equal to twice the sum of the sides adjacent to one corner. P = 2(a + b)
where P  perimeter of a parallelogram, a, b  lengths of parallelogram sides. Perimeter of a rhombusThe perimeter of a rhombus is equal to the product of the length of its side into four. P = 4a
where P  perimeter of a rhombus, a  the length of a rhombus side. Perimeter of a trapezoidThe perimeter of a trapezoid is equal to the sum of the lengths of its sides. P = a + b + c + d
where P  perimeter of a trapezoid, a, b  the length of 2 trapezoid bases,i.e., the parallel sides, c, d  length of the legs (the lateral sides). Perimeter of a circle (Circumference)
where P  perimeter of a circle, r  the length of the circle radius, d  the length of the circle diameter, π = 3.141592.
Geometry formulas
Square. Formulas and Properties of a Square
Rectangle. Formulas and Properties of a Rectangle
Parallelogram. Formulas and Properties of a Parallelogram.
Rhombus. Formulas and Properties of a Rhombus
Area Formulas for Geometric Figures
Perimeter Formulas for Geometric Figures
Volume Formulas for Geometric Figures
Surface Area Formulas for Geometric Figures
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